As of now it looks like you will have to wait to get a review of that case as on griffins website says coming soon. but you never know because if you look at my new thread Best Buy has the Griffin wave case for the 2g touch but is not even on griffins web page. Link to thread follows:

I was considering keeping it and having the Rebel... but the Rebel basically covers everything and I wouldn't ever need to take it off.

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You will still want to take it off to avoid getting scratches on your touch. I have the Griffin Sonic Wave Silicon case and I found out that after 2 Days of having it on there were a few little scratches on the back.